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Question by Thomvdm · Jan 12, 2018 at 03:34 PM · math

Why does this simple calculation not show decimals?

I'm trying to calculate the amount of pages my inventory has:

 float pages = Mathf.CeilToInt(InventoryItemHolder.transform.childCount / itemsPerPage);

the childCount is 19, the itemsPerpage is 16. I logged these numbers in the console to make sure the mistake isn't in there.


So, pages should be 2 (19 / 16 = 1.1875, rounded to upper int), however is 1.

The same problem happens when I simplify:

 float pages = InventoryItemHolder.transform.childCount / itemsPerPage;

Pages is still 1, instead of the expected 1.1875.

Why is this, and how can I solve it?

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Answer by FailDev · Jan 12, 2018 at 03:49 PM

Is childcount and itemsperpage both int's? If yes, Try casting the calculation to float, i think the implicit cast to float is only made after the calculation is allready done, which would result in behaviour you are observing.

  float pages =((float)InventoryItemHolder.transform.childCount / itemsPerPage);

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avatar image Bunny83 · Jan 12, 2018 at 04:02 PM 1
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Right, but you don't cast the calculation to float but one of the operands. As soon as one of the operands is a float the calculation will be done using floats and the result will be a float.

avatar image Thomvdm · Jan 12, 2018 at 04:08 PM 0
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That makes sense, and seems to be the solution indeed. Thank you.

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